Updates comment meta field based on comment ID.

Use the $prev_value parameter to differentiate between meta fields with the same key and comment ID.

If the meta field for the comment does not exist, it will be added.

$comment_id int Required

Comment ID.

$meta_key string Required

Metadata key.

$meta_value mixed Required

Metadata value. Must be serializable if non-scalar.

$prev_value mixed Optional

Previous value to check before updating.
If specified, only update existing metadata entries with this value. Otherwise, update all entries.

Default: ''

int|bool Meta ID if the key didn't exist, true on successful update, false on failure or if the value passed to the function is the same as the one that is already in the database.

File: wp-includes/comment.php. View all references

function update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value = '' ) {
	return update_metadata( 'comment', $comment_id, $meta_key, $meta_value, $prev_value );
}